Method for smithing aluminium alloy wheel hub of vehicle and smithing mold thereof

An aluminum alloy wheel and aluminum alloy technology, which is used in the forging field of forging molds and automobile wheel blanks, can solve the problems of waste waste, large mold costs, electricity and labor costs, high maintenance and replacement costs, etc., to improve quality and The effect of safety, saving mold cost and reducing maintenance cost

Inactive Publication Date: 2008-02-27
阜宁科达锻造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the forging process of a product with a similar size and weight to the aluminum alloy wheel hub of an automobile usually requires 2-3 times of die forging, in which the blank needs to be heated 2-3 times, using 2-3 pairs of forging dies, and finally It is also necessary to remove flash edges, therefore, it takes a lot of mold costs, electricity costs, and labor costs, and a large amount of waste generated by removing flash edges will also generate huge waste
In addition, the forging dies used in the existing forging process usually adopt the structure of an integral upper die and an integral lower die, and the maintenance and replacement costs of the damaged dies are huge

Method used

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  • Method for smithing aluminium alloy wheel hub of vehicle and smithing mold thereof
  • Method for smithing aluminium alloy wheel hub of vehicle and smithing mold thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] As shown in Figure 1, the forging method of the present invention comprises the following steps: (1) material preparation: the aluminum alloy bar stock of Φ 250 millimeters is cut into blank; (2) cleaning: clean blank, remove oil stain; Heat the billet from room temperature to 480°C in 1 minute, and keep it warm for 90 minutes; (4) Upsetting: forging 6 times under a 1000-ton press, upsetting the billet to Φ450 mm; (5) Preheating the forging mold: 15 minutes Preheat the forging die to 300°C; (6) Final forging: Brush No. 38 cylinder oil on the cavity surface of the upper and lower dies of the forging die, and when the billet drops to 450°C at room temperature, put the billet into a 1600-ton press In the lower forging die, after forging 5 times, it can be formed into an automobile aluminum alloy wheel blank.

Embodiment 2

[0026] As shown in Figure 1, the forging method of the present invention comprises the following steps: (1) material preparation: the aluminum alloy bar stock of Φ 250 millimeters is cut into blank; (2) cleaning: cleans blank, removes greasy dirt; Heat the billet from room temperature to 500°C in 1 minute, and keep it warm for 80 minutes; (4) Upsetting: Forging 5 times under a 1000-ton press, upsetting the billet to Φ430 mm; (5) Preheating the forging mold: 12 minutes Preheat the forging die to 280°C; (6) Final forging: Brush No. 24 cylinder oil on the cavity surface of the upper and lower dies of the forging die, and when the billet drops to 460°C at room temperature, put the billet into a 1600-ton press In the lower forging die, forging 4 times can be formed into an automobile aluminum alloy wheel blank.

Embodiment 3

[0028] As shown in Figure 1, the forging method of the present invention comprises the following steps: (1) material preparation: the aluminum alloy bar stock of Φ 250 millimeters is cut into blank; (2) cleaning: cleans blank, removes greasy dirt; Heat the billet from room temperature to 520°C in 1 minute, and keep it warm for 70 minutes; (4) Upsetting: Forging 4 times under a 1000-ton press, upsetting the billet to Φ410 mm; (5) Preheating the forging mold: 10 minutes Preheat the forging die to 250°C; (6) Final forging: Brush artificial wax on the surface of the cavity of the upper and lower dies of the forging die, and when the billet drops to 470°C at room temperature, put the billet into the 1600-ton press In the forging die, it can be formed into an automobile aluminum alloy wheel blank by forging 3 times.

[0029] In the above examples, artificial wax or No. 38 to No. 24 cylinder oil is used as the lubricant during die forging, instead of the graphite oil usually used in ...

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Abstract

The invention discloses a forging method of automobile aluminum alloy hub through once heating and one mould to manufacture non-flash automobile aluminium alloy hub, which is characterized by the following: the upper die is composed of upper central hammer, inner coil of upper die, middle coil of upper die and outer coil of upper die to be inserted assemblage sequently; the lower die contains lower central hammer, inner coil of lower die, middle coil of lower die and outer coil of lower die; the outer wall of middle coil lip of upper die is extended into the inner wall of the middle coil lip of lower die by 6-8mm when the die is moulding and sealing. The invention replaces the forging technique of aluminium alloy in the manufacturing course to improve mechanic property, automobile quality and safety greatly, which saves the process to cut flash without multiple heating and moulds, therefore reducing cost obviously.

Description

technical field [0001] The invention relates to a forging method, in particular to a forging method of an automobile wheel hub blank, and also relates to a forging die used in the forging method. Background technique [0002] At present, aluminum alloy wheels are being more and more widely used in the automotive field. In China, aluminum alloy die-casting processes are usually used to produce aluminum alloy wheel blanks. Aluminum alloy wheels produced by casting processes inevitably have casting defects and low mechanical properties. Therefore, it is imperative that the aluminum alloy forging process replace the aluminum alloy casting process in the production of aluminum alloy wheel blanks for automobiles. In the prior art, the forging process of a product with a similar size and weight to the aluminum alloy wheel hub of an automobile usually requires 2-3 times of die forging, in which the blank needs to be heated 2-3 times, using 2-3 pairs of forging dies, and finally It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/06B21J1/00C10M159/06B21J13/02B21K1/40C10N40/20
Inventor 徐国兴
Owner 阜宁科达锻造有限公司
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